Chevy S10 ex. cab ported box for Fi

Im in need of some help on building my first ported box, ive built sealed before, but im still a NOOB. Im using the RE calculator: http://www.reaudio.com/speaker_box/LPort_Box_Calc.html
and if someone can punch these following numbers in this order from top to bottom as follows:
*47.5
*26
*10
*20
*0.75
*4
*6

This is going to be for 2 15" Fi SSD's powered off my Sundown 1500SAZ. The SSD's are requiring 3-4 cubes each, im wondering if this enclosure will be appropriate for my setup.

Re: Chevy S10 ex. cab ported box for Fi

jump seat will be cut OUT! lol, no need for it, ill save the actual seat and buy a new panel if i get rid of the truck or something. But im going to cut that panel so it doesnt stick out. the box could be closer to 51" - 52", but im leaving room to mount the sundown on the drivers side. so the actual box will be about 47"- 48".